(7) Vessel aground in or near a fairway shows two red lights and two anchor lights when 150 feet in length (one anchor light only if under 150 feet).

(8) Open boat, fishing gear extending not more than 150 feet, shows all-round white light. When outlying gear extends more than 150 feet, a second white light, 3 feet below, 5 feet horizontally from first light, is shown in direction of gear. Fishing vessel at anchor with gear down shows the same lights, lower in direction of gear.

(9) Vessel desiring to attract attention shows flare-up light, or she may use a detonating or other efficient sound signal, in addition to the light she is required to carry.

(10) Thames dredger at work; three white lights in a triangle indicate that it is safe to pass her on either side. If one lower light is red it indicates that cables are out and it is safe to pass on the opposite side of the dredger. Anchor lights are carried also.

(11) Steam pilot vessel at anchor shows red globular light under the usual masthead light, visible all round, but not the usual side lights.

(12) Light vessel out of her proper station shows red light at either end and red and white flare-up lights, shown simultaneously every fifteen minutes.

(13) Vessel marking a Thames wreck, shows two green lights, one at either yardarm.

(14) Vessel at anchor, exceeding 150 feet in length, shows two globular lights visible all round, the lower of which is aft. When a pilot is required, a blue flare is burnt on the bridge at intervals.

(15) Vessel being overtaken shows a white light astern. A flare-up light may be substituted for this white light.